Gravimetric ore-roaster.



No. 69|,868. Patented 1an. 28, i902.

J. A. GDEN.

GRAVIMETBIG ORE RUASTER.

(Application led VMay 7, 1900.)

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JAMES OGDEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- THIRD TO CHARLES H. CORNELL, OF VALENTINE, NEBRASKA.

GRAVIMETRIC OREROASTER.

SPECIFICATION forming part of Letters Patent N o. 691,868, dated January 28, 1902.

Application filed Mey 7, 1900. Serial No. 15,6 '73. (No model.)

T a/ZZ whom it may concern:

Be it known that I, JAMES A. OeDEN, a citizen of the United States, and a resident of the city and county of Philadelphia and State of Pennsylvania, have invented acertain new and useful Improvementin Gravirnetric Ore- Roasters, of which the following is a clear, full, and sufficient specification, reference being had to the drawings annexed.

Io My invented device is intended to concentrate and dry or roast the comminuted ores, removing the lighter gan gue and roasting the heavier particles that remain. Its principle of operation may be dened to be causing the ore to pass down a plate by a series of jerks or jars, which cause the ore to distribute itself in layers or strata, with the heavier particles nearer the plate. The upper layers are then caused to flow over a barrier erected across the 2o plate, while the heavier are guided to a place whence they will pass to the plate on which they are roasted. These particles are then heated sufficiently for the purpose desired to be accomplished.

z5 Describing now the bestembodiment of my invention of which I am at present aware, Figure l is a plan view of my invented device, the furnace arch, smoke -stack, and other parts above the plate being removed.

3o Fig. 2 is a View of the left-hand end ofwFig. 1, and Fig. 3 is a vertical section on line :c of Fig. 2 and line y fy of Fig. l.

l is the plate upon which the ore is deposited and which may be called a concentrating-plate. It slopes downward toward the lower end of the furnace, and the ore flows over it under the jarring given to it, as will be described below. The bridge G, which forms a barrier, preventing the lower layers 4o or strata from flowing off the lower end of the plate, runs diagonally on the plate l. The hole A, which lies near the lower end of barrier G, extends through plate 1. This hole can be made of the desired size and shape.

The bridge G is preferably made V-shaped, as shown, the hole A being at the vertex of the V. VIt is very conveniently constructed by bending up the lower edge of the plate 1.

At the lower end of plate l is plate 2, the

5o end of which is preferably raised a little higher than the lower end of plate l, but not as high as the top of the bridge G. This plate is provided with the bridge F, similar to bridge G, and with the hole B, similar to hole A. The angle at the vertex of theVof the bridge F is more acute than that at the vertex of bridge G. The reason for this construction will be explained in the description of the operation of the device.

Fitting up to plate 2 is the conveyer-plate 3, 6o provided with the outlets 7 7 and the bridges H H. To carry off the gangue from these outlets, I provide the ports D D, which in practice I make in the furnace-walls. As shown in the drawings, the inner openings of these ports are large enough to allow of the necessary swinging play to plate 3. Beneath these plates is the plate L.t--the roasting-plate. In practice I connect these four plates together into a single structure andsuspend them from 7o the swinging links 5 5 5 in the furnace-flue, so that they are given an active swinging motion therein. I move them upward by the cam m, acting upon the abutment O. The jarring is given by the sudden stop produced by the striking together of the abutments r and 9. A hopper, as b, is provided to feed the ore to the plates. The plates are provided with turned-up edges or other suitable Vmeans for preventing the ore from passing 8o off the sides.

The operation of the device is as follows: The ore deposited upon the plate 1 iiows down it under the inuence of the jarrings produced as above described, the mass upon the plate at the same time forminglayers or strata, in which the heaviest particles lie nearest the plate. These heavy particles are guided by the bridge F toward the hole A,through which they pass, while the lighter particles flow over 9o the bridge to the plate 2. Here a further separation takes place. As the difference in weight of the particles in the inass on plate 2 is less because the heaviest particles have passed through the 'hole A, the separation is 95 more diihcultly effected. The bridgeF therefore by slanting more than bridge G, guides the particles more readily to the hole B, (or, in other words, the tendency of the particles is to pass along the inside edge of the roo bridge F, while the tendency of the same particles would be to mount over the bridge G,)

directly upon the plate 3, as many ores will be sufficiently concentrated by a single operation.

As the ores will be dried and partially heated by heat that otherwise would be almost entirely wasted during the concentration,the operation of my machine is very economical.

Having now described myinvention, what I claim, and desire to secure by Letters Patent, is

l. The combination with a furnace, an inclined, freely-swim gin g roasting-plate, located therein, means for swinging said roastingplate toward its higher end, and abutments for suddenly checking its movement in the other direction, of a separating-plate separated from and superimposed upon said roasting-plate,and provided with a diagonal bridge, an outlet for said concentrates, and an outlet for the gangue, leading away from the concentrating-plate substantially as described.

2. The combination with a furnace, of an inclined freely-swinging roasting-plate situated therein, means for supporting said plate and swinging links connecting the supports and plate, a separating-plate, superimposed upon and separated from said roasting-plate, and provided with a diagonal` bridge, and an outlet for the concentrates near the lowest part of said bridge, and leading to said roasting-plate, and an outlet for the gangue leading away from the concentrating-plate, and means for jarring said swinging roastingplate; substantially as described.

3. The combination with the furnace having an inclined flue therein, of a roasting-plate located in said iiue, a separating-platev superimposed upon and separated from said roasting-plate and provided with adiagonal bridge and an outlet for the concentrates, means for suspending and jarring said plates, and an outlet for the gangue leading from the concentrating-plate; substantially as described.

4. The combination of a furnace, a roasting-plate located therein, a concentratingplate superimposed upon and separated from said roasting-plate and provided with a V- shaped bridge, and with an outlet for the concentrates near the apex of the V leading to the roasting-plate, an outlet for the gangue leading away from said concentrating-plate, and means for moving said ore along said plates; substantially as described.

5. The combination with a furnace having an inclined flue, of an inclined,'swinging, roasting-plate and provided with means for supporting and swinging same, situated in said flue and provided with a superimposed cencentrating-plate separated from said roasting-plate provided with inclined bridges and outlets for the concentrates leading from the lower part of said bridges to the roastingplate, ports in the side of said furnace and outlets for the gangue leading from said concentrating-plate to said ports; substantially as described.

6. The combination with a furnace of an inclined, freely-swinging, roasting-plate situated in said furnace, provided with a superimposed concentrating-plate secured to and moving with said roasting-plate but separated therefrom, a V-shaped bridge upon said concentrating-plate, an outlet, near the lower part of said V leading through the concentrating-plate to the roasting-plate, means for swinging the said plates toward the higher end of the plates, and abutments placed to stop suddenly the swing of the plates in the other direction; substantially as described.

'7. In a gravimetric ore separator and roaster, a roasting-plate, and separating and concentrating plate snperposed above said roasting-plate, and joined together with it into one structure, but there being an interval of separation between the two plates, a diagonal bridge upon the concentrating-plate, an outlet for the concentrates from the concentrating-plate upon the roasting-plate, and an outlet for the gangue leading away from the concentrating-plate; substantially as de- Scribed.

8. The combination with a furnace, of a swinging plate extending through the same, a series of plates secured to said plate and spaced slightly above the same, each plate being provided with an inclined bridge, toward the lower end of which bridge is an opening from the upper to the lower plate,

kmeans for jarring the swinging structure, and

an outlet for the gangue from said superimposed plates substantially as described.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JAMES A. OGDEN.

Witnesses:

D. B. R. DicKiNsoN, B. B. SHEPHERD.

ICO

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